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Old 03-20-2009, 02:23 PM   #1
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Air Admittance Valve

I am building in a small town that has adopted the 2006 International Plumbing Code. Are AAV's allowed in this code?

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Old 03-20-2009, 03:06 PM   #2
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Air Admittance Valve

All codes are subject to interpretation by the local inspector.
Check with your bldg. dept.

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Old 03-23-2009, 03:43 PM   #3
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Air Admittance Valve

Yes it's allowed, but the city/county has the final say.

Also, there are situations where an AAV is not to be used.
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Old 03-23-2009, 05:38 PM   #4
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Air Admittance Valve

It really depends on the local authority. Where I live they are allowed except in the city. One county over they are never allowed...go figure, eh? The IPC generally allows them, but if a local authority has more restrictive requirements then the more restrictive prevail....at least here. Just call your building dept and they can let you know for sure.
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Old 03-23-2009, 08:56 PM   #5
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Air Admittance Valve

Not all AAV are created equal. Some are allowed others are not.
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